Disable access to Windows Task Manager in Windows 7

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The Windows Task Manager is accessible by pressing Ctrl + Alt + Del, can be used to see the applications, processes, CPU, memory usage and other information. However, you can also delete a process being used and it may be interested to restrict users access to the task manager for security reason.

It is specially an important part for creating a Windows 7 based KIOSK or embedded system, for banks or other institutions, or any where where the administrator simply do not want the user to know what operating system is running or simply to stop users to modify the registry.